Lighting-arrester.



No. 656,780. I Patented Aug. 28, I900.

v w. E. ATHEARN.

LIGHTNING ABRESTER.

(Application filed Feb. 16, 1898.)

(No Model.)

2 6 5 J" L f 0 Z 11/ K 1 nllll m l IIHI illllm C w --1 I I f z i WITNESSINVENTOI? a? gfwu 4 T OHIVEY 4o when the arrester is placed in positionthe UNITED STATES PATENT Fries IVILLIAMEDWVARD ATHEARN, OF hlEhV YORK,N. Y.

LIGHTNING-ARRESTER.

SPECIFICATION forming part of Letters Patent No. 656,780, dated August28, 1900.

Application filed February 16,1898. $erial No. 670,596. (No model) Toall whom it may concern.-

.. Be it known that'I, WILLIAM EDWARD ATHEARN, a citizen of the UnitedStates, and a resident of New York city, borough of Brooklyn, in thecounty of KingsandState of New York, have invented certain new anduseful Improvements in Lightning Arresters, of which the following is aspecification.

This invention relates to the class of lightning arresters that dependupon chokecoils for effect, and has for its object a simple, compact,self-contained instrument possessing the highest efficiency.

The object is attained by the means set forth in the accompanyingdrawings, in which like characters refer to similar parts throughout theseveral views.

Figure I represents an elevation of the arrester. Fig. II represents atop view of the arrester. Fig. III represents abottom view of thearrester.

The arrester consists of an elongated porcelain block, the ends a a ofwhich are rectangular in cross-section, having holes .3 s, Fig. 2, attheir extreme end, for fastening the arrester in place. A centralsection 0 of the block is likewise rectangular in cross-section, whilethe portions 1' r are round and are provided with a spiral groove like ascrew-thread, except that the out of the thread is semicircular toconform to the shape of the wire to be wound in it, as shown at 1 1,Fig. III. In the said groove a copper wire t, preferably bare, is wound,starting with the binding-post b and winding in a single piece to thebindingpost I). In Fig. III is shown 110w the wire passes from thesection 0" to r, the section 0 being recessed on the under side to admitof the wire crossing overbelow the surface of the block, as alsoindicated in Fig. I, so that wire will not be in contact with whateverthe arrester may be affixed to. It will be observed also, by referenceto Fig. I, that the screw that holds the binding post g also lies in arecess still farther Within the block to avoid all contact with thewire. The wire thus wound on the block constitutes a part of the circuitin which the arrester is placed. Each of the parts a a is provided withtwo binding-posts. The line L is connected with the two outer posts 13p, and these two posts are connected with the posts I; b by fuses f j.

All the screws securing the binding-posts to the block have their headsindeep recesses in the base of the block, as in Figs. Land II.

Numbers of these arresters are often installed together, being placedvertically in rows side by side and close together. To provide for fusesthat in blowing might interfere with neighboring fuses, a recess isprovided in one end, or both ends, if needed, beneath the fuse, as inFig. II, at 0. When the fuse is placed beneath the binding-posts, it maybe depressed within the recess, as indicated by a broken line, Fig. I.The recess is of such capacity as not to interfere with a propercirculation of air around the. fuse. Whenjthe fuse is so placed, itsblowing can do no harm. vThe ends a a are notched on their inner topends, as at n 11-, Figs. I and II, to receive a brass plate m, and thesection a is reduced at the top to a level with the notches. The brassplate m rests on the section 0 and the notches a close to the wirecoils, where it is securely held by a nut 1' under the bindingpost 9.This plate constitutes the ground, and the ground-wire is connected tothe binding-post g.

While the arrester shown is described as made ofporcelain, it will beunderstood that this material has been found to be the best for thepurpose; but the block maybe made of any non-conductin g material. Ialso reserve the right to vary the shapes herein shown, so long as theprinciples of the invention are adhered to.

What I claim, and desire to secure by Letters Patent of the UnitedStates, is-

1. A lightning-arrester comprising a block of non-conductivity havingelongated ends bearing connections for the line and fuses, a centralportion to which the ground-plate and ground connection are secured, andin termediate sections wound with coils of wire that constitute part ofthe line-circuit, and a ground-plate secured to the said central portionand extending contiguous to the said coils to each of the said endsections, substantially as herein shown and described.

2. The combination in a lightning-arrester of a now-conducting blockhaving sections a, (t, provided with binding connections for the lineand fuses, screw-holes for securing the block to a base, the centralsection for the support of the ground-plate having, its top surface onthe plane of the notches in the end sections, and the intermediatespirallygrooved sections, with the bindingposts, fuses, and coilsforming a part of the line, and the ground-plate and connection, substantially as herein shown and described.

3. A lightning-arrester comprising a block of non-conductivity havingelongated ends with connections for the line and fuses, a recess in theend for the depression therein of

